On season three's third episode of the Fox hit series "Glee," Emmy Award winner Valerie Mahaffey and Don Most will guest star as the parents of guidance counselor Emma Pillsbury (Jayma Mays). Also, viewers will meet Mike Chang's (Harry Shum, Jr.) parents, who will be played by Keong Sim and Tamlyn Tomita.

In the episode, according to Fox, "Rusty (Most) and Rose (Mahaffey) Pillsbury pay Emma a visit and we get a sneak peek into her deep rooted issues. Meanwhile, Mike Chang struggles with his grades and his parents (Sim and Tomita) step in to make sure he stays on track."

Heather Morris, who plays Brittany, will cover Beyonce's "Run the World (Girls)" and Amber Riley, who plays Mercedes, will perform Jennifer Hudson's "Spotlight."